EP1121510B9 - Verfahren zum wiederanfahren einer gas- und dampfturbinenanlage - Google Patents
Verfahren zum wiederanfahren einer gas- und dampfturbinenanlage Download PDFInfo
- Publication number
- EP1121510B9 EP1121510B9 EP99955808A EP99955808A EP1121510B9 EP 1121510 B9 EP1121510 B9 EP 1121510B9 EP 99955808 A EP99955808 A EP 99955808A EP 99955808 A EP99955808 A EP 99955808A EP 1121510 B9 EP1121510 B9 EP 1121510B9
- Authority
- EP
- European Patent Office
- Prior art keywords
- steam
- water
- gas
- turbine
- steam turbine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D19/00—Starting of machines or engines; Regulating, controlling, or safety means in connection therewith
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
- F01K23/106—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle with water evaporated or preheated at different pressures in exhaust boiler
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
Definitions
- the invention relates to a method for restarting a Gas and steam turbine plant, which consists of a gas turbine escaping flue gas passed through a heat recovery steam generator is, its heating surfaces in the water-steam cycle the steam turbine are switched.
- the In a gas and steam turbine plant, the is relaxed Work equipment or flue gas contained in the gas turbine Heat used to generate steam for the steam turbine.
- the heat transfer takes place in one of the gas turbines on the flue gas side downstream heat recovery steam generator, in the heating surfaces are arranged in the form of tubes or tube bundles. These in turn are in the water-steam cycle of the steam turbine connected.
- the water-steam cycle includes usually several, for example three, pressure levels, where a preheating and an evaporator heating surface for each pressure level having.
- black start ability the plant.
- start a gas and steam turbine plant is the supply of energy, for example for Supply of cooling or auxiliary systems or for starting the Gas turbine itself, required. Only after the load has been lifted the gas turbine can supply this with energy take over all auxiliary systems or self-consumers, so that an external energy supply is no longer required.
- an extensive power grid is used for external energy supply via the power grid and is therefore unproblematic. If however, no external power grid is available, for example because this has failed as a whole ("black Network ”) or because it is an island network that powered exclusively by the gas and steam turbine system a so-called black start is required, i.e.
- the gas and Steam turbine plant usually a diesel generator or a other emergency power generator on which the supply of the for Starting required components without recourse ensures the power grid.
- emergency generators For the design of these emergency generators is usually the case of a so-called To base hot starts on the gas and steam turbine plant emergency shutdown due to a power failure and immediately afterwards, i.e. with still hot Waste heat boiler to be restarted.
- the emergency generators are to be designed that in addition to the capacity for so-called towing or Starting the gas turbine itself also has capacity for supply the essential units of the heat recovery steam generator, in particular the cooling water pumps and / or the feed water pumps, is available. This is especially sufficient for one Cooling the heat recovery steam generator and thus to avoid it significant from damage. Since these aggregates, especially in Comparison to the gas turbine itself, but a significantly increased one Require supply capacity is one for a black start when restarting after one Power failure designed gas and steam turbine plant, in particular with regard to creation and assembly, particularly complex, especially with the design and conception of the emergency generators the effort is disproportionate to the required Capacity increases.
- the Emergency generators can one for a black start when restarting gas and steam turbine plant designed after a power failure also be equipped with a bypass chimney, bypassing the flue gas of the gas turbine during the hot start of the waste heat boiler.
- a bypass chimney means additional undesirable manufacturing and assembly costs, so that modern gas and steam turbine plants usually without bypass chimney are executed.
- the invention is therefore based on the object of a method to restart a gas and steam turbine plant Specify above type, which also for an investment Without a bypass chimney, a black start even with a hot start is made possible with particularly little effort.
- This object is achieved by a number switched into the water-steam cycle of the steam turbine Water-steam drums are generated using the steam Feeding the in the water-steam drums generated steam in a in the water-steam cycle the steam turbine switched capacitor and the Feeding in of outflowing from the condenser Feed water in a high pressure stage of the Steam turbine using a feed water pump first released when the gas turbine has been loaded become.
- the invention is based on the consideration that the Black start capability of the gas and steam turbine system too ensured at a hot start with very little effort can be by the led in the flue gas of the gas turbine Waste heat for a short period of a few minutes after starting the restart process in the large material and water masses temporarily stored in the heat recovery steam generator becomes.
- Reliable cooling of the heat recovery steam generator is ensured by putting in the water-steam drums Steam is generated.
- On a supply of this steam in the capacitor is initially dispensed with, so that the capacitor is not operational during this phase must be kept. This can cool the capacitor this phase does not apply, so that one to manufacture the emergency power generator provided for black start capability be designed to supply the corresponding cooling systems got to.
- the supply of the generated steam into the condenser is only at a time after the load has been lifted Gas turbine provided.
- the energy supply takes place in this phase the auxiliary systems of the heat recovery steam generator already again via the gas turbine, so that the cooling systems for the capacitor are activated again.
- each water-steam drum a compared to the delivery pressure of the condensate pump, which is, for example, up to 25 bar, lower Pressure set.
- the delivery pressure of the condensate pump which is, for example, up to 25 bar, lower Pressure set.
- this can result in a drop in pressure be provided, for example via diversion stations or by blowing off into the surrounding atmosphere or via ventilation and / or drainage valves are made can.
- FIG. 1 An embodiment of the invention is based on a Drawing explained in more detail.
- the figure shows schematically a gas and steam turbine plant.
- the gas and steam turbine system 1 comprises a gas turbine system 1a and a steam turbine system 1b.
- the gas turbine system 1 a comprises a gas turbine 2 with a coupling Air compressor 4 and one of the gas turbine 2 upstream Combustion chamber 6, which is connected to a compressed air line 8 of the Compressor 4 is connected.
- the gas turbine 2 and the Air compressor 4 and a generator 10 sit on a common one Wave 12
- the steam turbine system 1b also includes a steam turbine 20 coupled generator 22 and in a water-steam cycle 24 one of the steam turbine 20 downstream capacitor 26 and a heat recovery steam generator 30.
- the steam turbine 20 consists of a first pressure stage or a high pressure part 20a and a second pressure stage or a medium pressure part 20b and a third pressure stage or a low pressure part 20c, the generator via a common shaft 32 22 drive.
- the heat recovery steam generator 30 comprises a condensate preheater 40, the input side via a condensate line 42, in the a condensate pump unit 44 is connected, with condensate K can be fed from the capacitor 26.
- the condensate preheater 40 is on the output side via a line 45 to a feed water tank 46 connected.
- the condensate preheater 40 can also the condensate line 42 directly via a bypass line, not shown be connected to the feed water tank 46.
- the feed water tank 46 is via a line 47 to a high-pressure feed pump Feed water pump designed with medium pressure extraction 48 connected.
- the feed water pump 48 brings this out of the feed water container 46 outflowing feed water S to one for one High pressure part of the steam turbine 20 assigned high pressure stage 50 of the water-steam circuit 24 suitable pressure level.
- the Feed water S under high pressure is the high pressure stage 50 can be supplied via a feed water preheater 52, the on the output side via a valve 54 that can be shut off Feed water line 56 connected to a high pressure drum 58 is.
- the high pressure drum 58 is with one in the heat recovery steam generator 30 arranged high pressure evaporator 60 for Formation of a water-steam cycle 62 connected.
- For draining of live steam F is the high pressure drum 58 to one in the heat recovery steam generator 30 arranged high pressure superheater 64 connected, the outlet side with the steam inlet 66 of the High-pressure part 20a of the steam turbine 20 is connected.
- the steam outlet 68 of the high pressure part 20 a of the steam turbine 20 is to the steam inlet 72 via a reheater 70 of the medium pressure part 20b of the steam turbine 20 connected. Its steam outlet 74 is connected via an overflow line 76 the steam inlet 78 of the low pressure part 20c of the steam turbine 20 connected. The steam outlet 80 of the low pressure part 20c Steam turbine 20 is connected to the condenser via a steam line 82 26 connected so that a closed water-steam cycle 24 arises.
- Feed water preheater 86 or medium pressure economizer with one assigned to the medium pressure part 20b of the steam turbine 20 Medium pressure stage 90 of the water-steam cycle connected.
- the second feed water preheater 86 is on the output side via a feed water line that can be shut off with a valve 92 94 connected to a medium pressure drum 96 of medium pressure stage 90.
- the medium pressure drum 96 is in the heat recovery steam generator 30 arranged, as a medium pressure evaporator trained heating surface 98 to form a water-steam cycle 100 connected.
- For removing medium pressure live steam F ' is the medium pressure drum 96 via a steam line 102 to the reheater 70 and thus to the steam inlet 72 of the medium pressure part 20b of the steam turbine 20 connected.
- the low pressure stage 120 includes a low pressure drum 122, which with one arranged in the heat recovery steam generator 30, as a low pressure evaporator trained heating surface 124 to form a Water-steam circulation 126 is connected.
- Low-pressure live steam F '' is the low-pressure drum 122 connected to the overflow line 76 via a steam line 128.
- the water-steam circuit 24 of the gas and steam turbine system 1 thus comprises three in the exemplary embodiment Pressure levels 50, 90, 120. Alternatively, however, fewer, in particular two pressure stages can be provided.
- the line 45 bypassing the feed water tank 46 connected directly to line 47 via a bypass line 130.
- the bypass of the feed water tank 46 is can be activated via a valve arrangement, the one Feed water tank 46 immediately upstream in line 45 Shut-off valve 132 and one in the bypass line 130 switched shut-off valve 134 includes.
- the gas and steam turbine plant 1 is capable of one Black start also designed for hot start.
- the gas and Steam turbine system 1 can thus after an emergency shutdown, for example, due to a failure of the connected Power grid, directly, that is, with one that has not yet cooled Heat recovery steam generator 30 can be restarted without this requires the use of an external power supply is.
- the gas turbine plant 1a is a number of Diesel generators, not shown, as emergency generators assigned to restart the gas turbine plant 1a deliver the required energy.
- the steam generated in this phase does not initially derived from the water-steam drums 58, 96, 122, but rather, leave it there, the vapor pressure increasing. In particular it is not initially fed to the capacitor 26, so that cooling of the capacitor 26 is initially not necessary is. Accordingly, commissioning is not carried out in this phase of the cooling system associated with the condenser 26.
- a second phase of restarting for example about 15 to 30 min. after starting the gas turbine 2, is the gas turbine 2 for supplying energy to self-consumers the gas and steam turbine plant 1 in the position.
- the auxiliary systems of the heat recovery steam generator 30, such as for example the condenser 26 and the feed water pump 48 and the cooling systems assigned to them, reactivated. It is only in this phase that the capacitor 26 Operational status restored. After that, the capacitor which in the first phase of the restart in the Water-steam drums 58, 96, 122 fed steam generated.
- the first phase of the restart is consequent on the use of particularly energy-intensive self-consumption waived.
- the emergency generators intended for the black start can be dimensioned accordingly small and thus with regard to the manufacturing effort and the associated costs can be carried out cheaply.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
Description
Claims (3)
- Verfahren zum Wiederanfahren einer Gas- und Dampfturbinen-Anlage (1), bei dem das aus einer Gasturbine (2) austretende Rauchgas über einen Abhitzedampferzeuger (30) geführt wird, dessen Heizflächen in den Wasser-Dampf-Kreislauf (24) einer Dampfturbine (20) geschaltet sind, wobei in einer Anzahl von in den Wasser-Dampf-Kreislauf (24) geschalteten Wasser-Dampf-Trommeln (58, 96, 122) Dampf erzeugt wird,
dadurch gekennzeichnet, daß die Zuführung des in den Wasser-Dampf-Trommeln (58, 96, 122) erzeugten Dampfes in einen in den Wasser-Dampf-Kreislauf (24) der Dampfturbine (20) geschalteten Kondensator (26) und die Einspeisung von aus dem Kondensator (26) abströmenden Speisewasser (S) in eine Hochdruckstufe (20a) der Dampfturbine (20) mittels einer Speisewasserpumpe (48) erst bei erfolgter Lastaufnahme der Gasturbine (2) freigegeben werden. - Verfahren zum Wiederanfahren einer Gas- und Dampfturbinen-Anlage (1) nach Anspruch 1, bei dem vor einem Start der Gasturbine (2) zur Erstbefüllung einer Anzahl von in den Wasser-Dampf-Kreislauf (24) der Dampfturbine (20) geschalteten Wasser-Dampf-Trommeln (58, 96, 122) eine der Speisewasserpumpe (48) vorgeschaltete Kondensatpumpe (44) verwendet wird.
- Verfahren nach Anspruch 2, bei dem zur Erstbefüllung in jeder Wasser-Dampf-Trommel (58, 96, 122) ein im Vergleich zum Förderdruck der Kondensatpumpe (44) geringerer Druck eingestellt wird.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19846458 | 1998-10-08 | ||
DE19846458A DE19846458C1 (de) | 1998-10-08 | 1998-10-08 | Verfahren zum Wiederanfahren einer Gas- und Dampfturbinenanlage |
PCT/DE1999/003092 WO2000022282A1 (de) | 1998-10-08 | 1999-09-27 | Verfahren zum wiederanfahren einer gas- und dampfturbinenanlage |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1121510A1 EP1121510A1 (de) | 2001-08-08 |
EP1121510B1 EP1121510B1 (de) | 2003-06-25 |
EP1121510B9 true EP1121510B9 (de) | 2004-03-03 |
Family
ID=7883866
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99955808A Expired - Lifetime EP1121510B9 (de) | 1998-10-08 | 1999-09-27 | Verfahren zum wiederanfahren einer gas- und dampfturbinenanlage |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1121510B9 (de) |
DE (2) | DE19846458C1 (de) |
ES (1) | ES2203207T3 (de) |
WO (1) | WO2000022282A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE50211611D1 (de) | 2001-09-14 | 2008-03-13 | Alstom Technology Ltd | G des arbeitsmittels eines zweiphasenprozesses |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5532916A (en) * | 1978-08-25 | 1980-03-07 | Hitachi Ltd | Method of making temperature of steam turbine metal of combined plant constant and its device |
DE3016777A1 (de) * | 1980-04-30 | 1981-11-05 | Hitachi, Ltd., Tokyo | Verfahren und regeleinrichtung zum betreiben eines kombinierten gas- und dampfturbinen-karftwerks |
JPS60166704A (ja) * | 1984-02-09 | 1985-08-30 | Toshiba Corp | 大気放出装置 |
US5048466A (en) * | 1990-11-15 | 1991-09-17 | The Babcock & Wilcox Company | Supercritical pressure boiler with separator and recirculating pump for cycling service |
DE19544226B4 (de) * | 1995-11-28 | 2007-03-29 | Alstom | Kombianlage mit Mehrdruckkessel |
-
1998
- 1998-10-08 DE DE19846458A patent/DE19846458C1/de not_active Expired - Fee Related
-
1999
- 1999-09-27 ES ES99955808T patent/ES2203207T3/es not_active Expired - Lifetime
- 1999-09-27 WO PCT/DE1999/003092 patent/WO2000022282A1/de active IP Right Grant
- 1999-09-27 DE DE59906124T patent/DE59906124D1/de not_active Expired - Lifetime
- 1999-09-27 EP EP99955808A patent/EP1121510B9/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ES2203207T3 (es) | 2004-04-01 |
DE19846458C1 (de) | 2000-03-30 |
WO2000022282A1 (de) | 2000-04-20 |
EP1121510A1 (de) | 2001-08-08 |
DE59906124D1 (de) | 2003-07-31 |
EP1121510B1 (de) | 2003-06-25 |
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